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(No Model.)

T'. A.MYBRS PISTON ARQD PACKING.

' Patente Aplzl, 188'4Q LUM Inventor: JwQ J4.

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' UNITED 'STATES PATENT Fries.

PlSTON-ROD PACKING.

SPECIFICATION forming part of Letters Patent No. 296,295, dated April 1, 1884.

Application filed November 30, 1983. (No model.)

To a/ZZ whom it may con/cern.-

Be it known that I, Tnnononn A. Marinas, a citizen of the United States, residing at lVheeling, in the county of Ohio and State of Test Virginia, have invented certain bnew and useful Improvements in PistonRod Packing, of which the following is a specification.`

My invention relates to an improvement in stutlingboxes for pistoni-od packing and stems of steam-valves.

The invention is fully illustrated in the accompanying drawings, and will iirst be describedin connection therewith, and then designated in the claims.

Figure l shows asteam-cylinder, piston, piston-rod, and my improved packing. Fig. Bis a side view, separately, ofthe slit packing-tube. Fig. 3 is a crosssection oi' the slit packingtube, showing the inner projections at the end.

The letter A designates the cylinder; B, the piston-head, and C the piston-rod. A metal chamber, D, is seated against the head A of the cylinder, to which it is made fast by bolts e. The hole f in the head, separating the stuting-box from the cylinder, throughwhich the piston-rod passes freely, is enough larger than the rod to allow the steam to enter the annular space d in the chamber D. This cham ber surrounds the packing-tube g.

The packingtuhe has longitudinal slits g', extending from one end to g2, near the other end. There may be four or more of these slits, which divide the tube into as many divisions. This packingtube surrounds the stem or rod,

adapted to expand and contract, as hereinafter stated.

The stung-box consists of the metal chamber D, having a cap, h, threaded to receive the nut I, through which passes the rod or stem G. The nut is simply to close the end of the packing-tube, one end of which is secured to the cap It of the stufngbox. The expansible ends of the several divisions oi the slit packingtube are provided with inward projections ln., to press against and around the rod or stem G.

The annular space between the rod and packing-tube constitutes the packing-chainber p, which is to be filled with an)T suitable packing material, which latter rests directly cessive friction of the packing while making the outward stroke.

By this device all necessity of screwing up nuts to tighten the packing is avoided. Anf other advantage resulting from this device is that in case the moisture in the packing should freeze, no damage will ensue toV the stuffingboX, because the packing-tube will expand.

This packing is designed for piston-rods and valve-stems, or any use where a moving rod is to be made steam-tight at an oriiice through which it passes.

Having described myinvention, I claim and desire to secnrcby Letters Patent of the United Statesl. The herein-described improvement in packing for piston-rods and stems of valves,

' consisting of a chamber having an annular space, d, and a hole through which passes the rod, and which allows the steam to enter the annular space, and a packing-tube, g, within the chamber, having divisions made by longitudinal slits g', and one end ofthe tube being secured to the cap of the chamber, whereby steam entering the annular space around the packingtube causes it to contract andthe eX- haust of the steam allows it to expand, as set forth.

2. Apacking-tube for piston-rods and stems of valves, having divisions made by longitudinal slits g" and inward projections 'n on the expansible ends of theseveral divisions, as set forth.

In testimony whereof I afx my signature in presence of two witnesses.

THEODORE A. MYERS.

Witnesses:

J. R. Cownnn, W. J. W. Cownnn. 

